I need help with my algebra hw?

Question

How do you solve: factor 1) x^2 + 3x +12 2)√18-√50

Simplify 3)12√x + 2√x 4)√3x^4 times √9x^3

Answer 1

1) x^2 + 3x +12  you can't i'm guess u typed it wrong

i think u meant 1) x^2 + 3x -12  = (x+7)(x-4)

2)√18-√50  =√9*√2 -√25*√2 = 3√2-5√2 = -2√2

3)12√x + 2√x = 14√x

4)√3x^4 *√9x^3 =  Ã¢ÂˆÂš3√x^4 * √9√x^2√x = x^2√3 * 3x√x = 3x^3√3x